PatternValidator

A directive that adds regex pattern validation to controls marked with the pattern attribute. The regex must match the entire control value. The directive is provided with the NG_VALIDATORS multi-provider list.

See also

• Form Validation

NgModules

• ReactiveFormsModule

• FormsModule

Selectors

• [pattern][formControlName]
• [pattern][formControl]
• [pattern][ngModel]

Properties

Property	Description
@Input()pattern: string | RegExp	Tracks changes to the pattern bound to this directive.

Description

Adding a pattern validator

The following example shows how to add a pattern validator to an input attached to an ngModel binding.

<input name="firstName" ngModel pattern="[a-zA-Z ]*">